Home / 20,602.13-28,431.14-11,170.89

Finding the Fourth Proportional to 20,602.13, 28,431.14 and 11,170.89

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Solution

The fourth proportional to 20,602.13, 28,431.14 and 11,170.89 is: 15,415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.13 : 28,431.14 = 11,170.89 : x
  2. Step 2: Convert to fraction form
    20,602.13/28,431.14 = 11,170.89/x
  3. Step 3: Cross multiply
    20,602.13x = 28,431.14 × 11,170.89
  4. Step 4: Simplify right side
    20,602.13x = 317,601,081.66
  5. Step 5: Solve for x
    x = 317,601,081.66/20,602.13
  6. Step 6: Final answer
    x = 15,415.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.